I recently obtained a Colt 1917 that has a parkerized finish and appears to be an aresenal rebuilt revolver. Its in excellent condition with very clean chambers and bore. I received some unused full moon clips with it. After loading them with some WW 230gr FMJ, I tried to insert them into the chambers and they wouldn't go all the way in without some force and then the cylinder either would not close or was too tight to rotate properly. Individual cartridges will chamber fine and .45 AR cartridges will also chamber and function. It appears to me that the opening in the center of the clip is not fitting the area of the center of the cylinder. I have had several S&W's in .45 ACP including a M1917 and have never encountered this. I know the 1917 was designed to use half moon clips. I don't have any of those at present. Has anyone experienced this? I suspect that the half moon clips will work properly. I can load AR ammo so the clips aren't really needed. I don't intend to use the revolver in competition or other situations where full moon clips would be essential. It is a large and serious looking revolver and is a great companion to for my Winchester 1897 Trench Gun and 1941 M1 rifle.